[turbofan] Lower mapped arguments objects in inline frame.

src/compiler/js-graph.cc

Index: src/compiler/js-graph.cc
diff --git a/src/compiler/js-graph.cc b/src/compiler/js-graph.cc
index a2ea092e126fb2f679372bacdc0e5b530c10d3f5..782236fe0c0c940ff3817d639e9e260e823c42b4 100644
--- a/src/compiler/js-graph.cc
+++ b/src/compiler/js-graph.cc
@@ -30,6 +30,12 @@ Node* JSGraph::CEntryStubConstant(int result_size) {
 }
 
 
+Node* JSGraph::EmptyFixedArrayConstant() {
+  return CACHED(kEmptyFixedArrayConstant,
+                ImmovableHeapConstant(factory()->empty_fixed_array()));
+}
+
+
 Node* JSGraph::UndefinedConstant() {
   return CACHED(kUndefinedConstant,
                 ImmovableHeapConstant(factory()->undefined_value()));